70 scamp. what wires out of ignition switch start the car?

Wiring diagrams such as they are

The main feed to the ignition switch is either a big fat red or black, check with your light

brown is "ignition 2" meaning it bypasses the resistor in start

dark blu is "ignition 1" meaning "ignition in run"

yellow is the "crank" that operates the firewall start relay. Don't forget---clutch safety switch? neutral safety switch?

http://www.mymopar.com/downloads/1970/70DartA.JPG

http://www.mymopar.com/downloads/1970/70DartB.JPG

It's probably easier to do under the hood. You can jumper the firewall relay to operate the starter, and clip power to the coil resistor for ignition

What do you have, xactly, fer ignition? Stock points, Mopar ECU, Pertronix, etc?